Thread waxing device



Aug. 20, 1935. F. c. CHOICE ET AL THREAD WAXING DEVICE Filed March 20,1955 2 Sheets-Sheet l I Aug. 20, 1935. F. c. CHOICE ET AL THREAD WAXINGDEVICE Filed March 20, 1953 2 Sheets-Sheet 2 Patented Aug. 26, 1935TH'READ WAXING DEVICE Frank: Coleman" Qhoice and Rowland AugustusLineham, Leicester,

England,

United Shoe. Machinery Corporation, Paterson,- I N; J.,a.corperation ofNew Jersey Application March 20, 1933, Serial No. 661,726

In-GreatBritain Apr-i128, 1932' 19 Claims. (01. 91-45 This inventionisconcerned withdmprovements inor relating to thread waxing devices and ishereinafter illustratively described in connection with a thread'waxingdeyicesuitabl'e for use on a boot or shoe sewing machine; 7

Sewing machines of various kinds are used in the boot andshoe industryfor sewing the uppers and welts welted s'lioesto insoles; for sewingoutsc-lesto thewelts of 'such shoes; forsewing the uppers of turnshoesdirectly to'- their soles and for sewing theout'sole of a Blake or'McKayshoe to the insole. Y

7 Sewing machines of the various kinds above indicated'arecustomarily'provided with wax-pots which are arranged tobe heated bysuitable before it passes to the sewing instrumentalities of themachine.

The advantages derived from using waxed thread in'such sewing machinesas have been mentioned are well understood and neednot' beparticularized herein.

The thread guiding means aforementioned which constrain the threadtopass through the melted wax inthe wax pot to become coated therebyusually comprise thread-guiding rolls which are supportedwithin the bodyof wax in the waxpot,

t is desirable thatthe'saidthread'guiding rolls should be heated bymeans additional to the hotwax' in order to ensure that they shall bemaintained at an adequate temperature so that the wax on thethread-shall not be" cooled and hard ened by contact with them.

t is also: desirable that the wax-pots of such machines should be ofsuificient capacity to ac commodate a relatively large amount of wax soas tc'avoid the need for frequent replenishment, and that the means formeltingthe' wax should be capable of: melting the wax quickly (forexample at the beginning'ofi a days work) withoutoverheating th'e'waxandthereby destroying some' of: its desirable'qualities.

When wax-pots or" the kind at present ingeneral use are arranged toaccommodatea relative1ylarge supply oi'wax it becomes dificult'toarrange fcr'rapid melting of. the body of' the wax by heating. meansexternal to the wax pot since aithcugh the wax lying closest to theheating means may melt comparativelyquickly yet, since the waxitselfiishut' a poor conductor. oflh'eat, the wax lies out offc'on'tact' withthe'walls of the wax pot melts but slowly. If; heating means intheinterior of the pot is made use of to melt the waxand is arrangedt'ogive off a rela tively intense heat to melt the wax rapidly, there isa danger that the waxi'n the immediatevicinity B: of the heating meanswill become overheated and charred; while wax which is remote from theheating means will melt onlysl'owly.

One oft-he severalobjects of the present invention isto provide anoveland improved means 101 in a wax pot to obtain eflicient heating of" thethread guiding rolls wherrthe' Wax. pot issecured inits operativepositiono I Another of the several objects of the present invention isto provide a novel and improved [5 formof Wax pot of relatively largecapacity in which a portion of the waxin it-maybe rapidly melted withoutbeing overheated;

Another of" the several objects of the present invention is to providea-noveliand improved forrn 20 of wax pot which shall berelativ'elysimple in'construction and efficientlinuse.

In an illustrative embodiment of the present invention hereinafterdescribed, a wax pot is provided in which the thread guiding rolls arecarried upon avertical plate arranged to contact with the heated bottomof the wax pot to be heated thereby, thus serving not only toheat" byconduction the thread guiding rolls which it carries, but also servingto heat the wax on' either side ofit; Means are also-'provided toclamp'the bottom: of the-wax potagainst the roll carrying plate. g l

Further, in the said illustrative embodiment the contacting faces of theplate andwax'pot are not plain but the'bott'om of the wax pot has a-/"-shaped' ribrunning along it on that portion against-whichthe bottomofthe said platepresS'esand the' bottom-of the-plate has-a v shapedgroove running along the-length of the-plate so that as 40 the wax potisraisedtO ardsthe plate; the rib onthe wax pot bottom enters into andpresses against the sides of the-groove in" the plate-andestablishesfirm contact therewith over a side area. Any wax which flows-within' thegroove in the bottom of the plate-when the wax pot-is: lowered from theplate will; before it hardens and sets, tendto'run down' the slopingsides of the groove, thus leaving themclean.

In the illustrative-form of wax pot hereinafter described which" isspecially suitable for use a boot or shoe sewing machine, the wax pot isheatedt by means housed at its bottomand is divided" into twocompartmentsby a; partition which contacts with'tlie'heated-bottom andis 5 itself heated thereby and extends upwardly therefrom, communicationbeing provided between the compartments through an opening in thepartition. Also, in the said illustrative form t the thread guidingrolls are arranged on the plate member in the wax pot in such a mannerthat thread passing round them; lies close to the heatedbottom of thewax pot and parallel to it, 1 thus ensuring that it is acted on by waxwhich is maintained in a very fluid condition due to the close" presenceof the heating means.

In order that the nature of the present invention may be moreclearlylunder'stood, the.-illus' trative form of wax potaforementionedwill nowbe described with referenceto' the accompany ingdrawings.

' In the drawings:

- across the waxpotgenerally parallel tortheloack' Figure 1 is a frontview'of the said illustrative I .form'of wax pot; w e Figure 2 is a sideviewpartly brokeniaway, of the wax pot seenin Figure 1-; v n ,o

Figure 3 is-a plan viewsof the wax pot showinga cover for the potpartially removed from over thezpot; and 1 Figure l is a front view ofcertain parts of the wax pot.

In the ,saidillustrative form the wax pot come prises a metal casting i.'(see particularly Fig.,2)1 'of a substantially cubical shape with anopen. top, of a suifieientsize to .hold'about two pounds of wax. ,Thewaxpot'iscarrieduponthe-lower ends of a pair of sliding vertical rods 3.which pass through bearings a; fixed portion .of a cover jfo'r thepot.Apair of electrical heating elementsfi; 5 are arrangeduwithin athickened portion 1 (see Figure 2 )iof'the bottom of the wax potwhich'portion extendsjdownwardly from the pot and these elements extend,near the back of the pot, parallel to theflatter across the, pot. Averticalweb or partition 91 of. metal extends thereof and some distanceinfront of thelatter, and this web is joined to the sides and bottom .ofthe wax potand is so locatedin itthat it-lies substantially overtheforward end-of the downer wardly extending portion 1 ofthe bottom ofthe,

pot in which the heating elements fi lie. The

bottom of this web,' gwhic h as before stated is joined to the bottom ofthewaxpot. lies as shown in Figure 2, slightly forwardly'of the forwardvone oftheheating elements 5and becomes-heated by direct conduction; fromthe thickened portion,

of the bottom of the. potI'The web extends almunic ation between-theitwoparts of the pot separatedby the web, while allowing wax to flow freelyfrom the' part of the wax pot in front of the Web into the part ofthewax pot behind the web, prevents a circulationof the wax from takingplace around the frontand rear sides of the web, The two parts intowhich the web divides the pot are of unedua1 capacity, theone 13 betweenthe web and the rear wall of the pot forming a smaller or narrowercompartment and hav ing a waxjholding capacity equal to less than halfthatiof the larger compartment i5 lying between the web and-the frontwall ofth'e pot. The

rearward heating elementiiof the pair of heating elements lies in thelillustrative form of wax pot, directly underneath the-smallercompartment !3, so thatwax in this compartment will be heated rapidly.Further heating of wax in the smaller compartment 13 will take place duenot only to the fact that the web 9 (which constitutes the front wall ofthis compartment) is heated by actual contactwith the thickened portionI of the bottom of the wax pot which houses the heating elements, butalso due to the fact that the rear wall of the pot (which also comprisesthe rear wall of thissmaller compartment) and'als'o the sides of thiscompartment are'heated by direct conduction from the heating elements.

Therefore the smaller compartment is heated on all its sides and itsbottom by'heating elements positioned directly beneath the smallercompartment and since it is narrow from front to back, "wax in itwill'melt quickly. Also due to the fact that the whole of the bottomv andsides of the wax pot including its front wall become directly heated bythe elements 5, wax placed in the larger compartment. I5 will also bemelted though more slowly thanthe wax in the smaller compartment i3, andcan therefore flow into the latter through the opening H in the web S toreplace wax used therefrom. A relatively fixed supporting bracket memberil' (seeFigures 2 and 3) secured to the frame ofthe machine '(which mayfor example be a boot or shoe sewingmachine) with which the wax pot isto be used. extends forwardly over the pot forashort ;distance fromitsrear and cooperates witha removable member t9 (which is shown in Figure3 in a position swung somewhat away from over *the pot) freely mountedon a, pivot-20 carried in ears projecting fromthe'fixed member I! infront of the, left hand-one of saidrods'3 to constitute accver for thepot. 1

' A feature of the present invention comprises'a plate 2 l (see Figures1 'and l) which is sorr ewhat narrowerat the top than the bottom, lyingsubstantially parallel to the back of the wax pot and having upwardlyextendingpins 23 secured to its upper edge close to its opposite sidesand these pins project upwardly through bearings in the fixedmember l'i. Short springs 25 are located on the pins 23 between the top of theplate 2! and the underside of the member H and urge the saidplate'downwardly until itis arrested by contact between the member 61and heads on the upper ends of said pins. Thepl'ate 2! is so positionedon the member I1. and is of such size that when the wax pot' is inproper position to waxthread passing'through it, the said plate. isreceived wit.

ing the smallerv compartment l3 of the pot and fairly close t'o' itsrear wall. g p 7 The plate?! carrieson its forward side and near itslower corners two threadguiding rolls 69 extends a substantial. distanceacross the pot which are freely rotatable on pins 5i projectingforwardly fromthepl'ate. I The plate also carries on its forward side athird thread guiding roll 53 which is positioned slightly to one side ofthe plate and about half way up the height of the latter. The thread 5 5is'arra'nge'd (as shown clearly in Figure l) to. pass into the wax potthrough an openingformed partly "in the fixed part I! of the cover andpartly in the movable part IQ of the cover and passes first around theright hand side of the third thread guiding roll 53. From this roll thethread passes across the plate to theguide roll 9 which is positionednear its leftv hand bottom corner and passes downwardly around this rolland then proceeds in 'a horizontal direction fairly close' to the heatedstripper were not heated by any means.

mounting the stripper on the plate in this man- I pivot pin for the roll53 passes and which stripper plate serves to remove any globules of waxwhich may be adh ring to the thread. From this stripper the threadpassesupwardly through a second stripper arrangement. This second stripperarrangement comprises a metallic block 6| (see 'Fig. 3 particularly)with a V-shaped opening running vertically in its inner face againstwhich the thread is held pressed by a spring pressed plunger 83 having avertical slot in it near its inner end through which the thread passes.

The cooperating faces on the plunger 63 and the block 6| gripthe threadbetween them with a pressure which is adjustable by means of a nut 55,threaded onto the forward end of the plunger 63, which can be rotated toadjust the strength of the plunger spring 66. The stripper block 6! ishoused in a carrier member 6? (see Fig. l) which is secured to the plate2| which carries the thread guiding rolls 49 and53 so that the stripperbecomes directly heated by heat conducted to it from the plate and doesnot tend to congeal the wax on the thread as it would if the y ner thenecessity for providing separate heating means for it is avoided. Ifdesired, a stripper of the rubber block may conveniently be employed inplace of the metallic stripper just described.

The wax pot is arranged to be lowered away from the plate 2| to allowthe thread to be passed around the thread guiding rolls on the plate 2|when the wax pot is to be put into use and is also arranged to be liftedand clamped positively into contact with the bottom of the plate 2|after the thread has been placed around the thread guiding rolls. Forthis latter purpose the two sliding vertical rods 3 upon which the waxpot is carried pass, as before stated, through vertical 1 bearings,indicated at 28, in the fixed member I! and the bearings each have ashort pin 2'! (see Figs. 1 and 3) projecting horizontally and laterallytherefrom and each of these pins has a roll 29 freely rotatable on it.The left and right 1 hand walls of the wax pot have fixed pins 3|extending laterally therefrom near their upper edges below and parallelto the pins 21 on the fixed member I! (see Figure 1). Sleeves 33 arefreely pivoted on the pins 3| and these sleeves are'secured againstaxial movement on the pins by heads on the outer ends of the latter. Thesleeves 33 have formed on their inner ends cam members which haveoverhanging flanges 31 around their outer edges which extendhorizontally inwards towards the wax pot. The overhanging flangessubtend an angle at the axis of the sleeves approximately equal to aright angle and extend, before the sleeves arerotated in the mannerhereinafter described, from a position substantially horizontally infront of the axis of the sleeves upwardly and rearwardly to a positionjust forward of the vertical plane containing the axis of the sleeve.The radial distance of each of the overhanging flanges 31 from the axisof its sleeve decreases gradually from its upper end towards its lowerand more forward end thus providing an overhanging snail cam the portionof which having the least radius is positioned on the lower portion ofthe cam in front of the sleeve. Knurled hand wheels 39 are provided onthe outer ends of the sleeves 33 by which the sleeves and cam members 35may be rotated ina rearward direction (i. e. a counter clockwisedirection looked at from the leftof the machine) when the wax pot hasbeen lifted bodily so far by hand from a lowered inoperative positionthat the upper ends of the cam members are approximately level with theupper surfaces of the rolls 29 on the pins 27 which are secured in thefixed cover member ll. When the wax pot'has been raised so far and thehand wheels 39 are rotated in the direction indicated, the action of thesnail cams in riding over the rolls 29 will cause the wax pot to belifted positively a small amount, thus causing the bottom of the wax potto be pressed firmly against the bottom of the vertical plate 2| which,by reason of its being urged downwardly by the springs 25,

can yield upwardly somewhat as the bottom of the wax pot is forcedagainst it. Once the cams have been caused to ride over the rolls 29 tolift the wax pot into firm contact with the bottom of the plate 2| theyserve to clamp and retain the said wax pot pressed upwardly against theplate. Thus assurance is afforded that heat will be able to passdirectly from the heated bottom of the wax pot to the plate 2| and themembers carried by it.

In order to prevent wax which may settle on the bottom of the plate 2|when the wax pot is lowered out of contact with the plate 2| frompreventing firm contact between the bottom of the plate and the bottomof the wax pot when the latter is once more raised to its operativeposition, an inverted V-shaped groove 4| is formed along the bottom ofthe plate 2| and an upstanding V-shaped rib or ridge 43 is provided onthe bottom of the wax pot to engage within and press against the sidesof the groove 4| as the wax pot is forced upwardly against the plate(see Figure 2). The sides of the said groove and ridge are somewhatsteep so that any wax which may remain in or find its way into thegroove after the wax pot has been lowered from the plate will, before itsets, tend to run down the sides of the groove and leave the internalfaces of the groove clean. The top of the ridge 43 is flattened a smallamount so that a small gap exists between the top of the ridge and theapex of the groove 4| into which any wax wiped upwardly along the sidesof the groove in the plate as the ridge moves upwardly into contact withthem may escape. It will be observed that the ridge and groovearrangement between the plate 2| and the bottom of the wax pot providesa relatively large area of contact, between the heated bottom of the waxpot and the plate, which ensures that an adequate supply of heat shallbe conducted to the plate.

The plate 2| has projecting from one side upwardly and rearwardly fromit near its upper end and centrally thereof a neck 45 (see particularlyFigure 2) which projects through the mouth of the wax pot and isarranged to extend beneath a thread tension device with which themachine with which the wax pot is associated may be provided and aroundwhich tension device the thread passes from the wax pot. The neck 45 issemi-cylindrical in section (its open side being directed towards thefront of the wax potfand servesto catch and;- defiectintolthe wax potthrough an opening; 47 in'theneck fany,

portionsof wax'which are stripped from the thread by the saidtension-device.

From whathas been said above, itwill derstood that the wax pot, of the.present illustrative embcdiment'can beloweredaway from the plate 2i whenthe-hand wheels 39uhavebeen roe tated forwardly tocauseithegnoverhanging' flanges 3? of the cam members 35;to ride out of,lengage+ ment with the rolls 29. 7 Whenit-ds desiredto raise the potvonce more to operative position against and surrounding the pate-.21,itislifted bythe operatoruntil the uppers-ends oi-the over; hangingflanges 3? are level with the topsofthe rolls 29 and the hand wheelsfiilare then rotated rearwardly .to cause, by, the lifting; cam action ofthe cams on the rolls,ithfe V shaped ridgef43 on the bottom of the: pot;,to engage within and e be pressed firmly against the sidesof thegroove 41in the bottom of the plate-2|, thus ensuring that heat. willreadily be conducted from the heated bottom of the wax pot to theplateand thermostat 69 is shown as located onxthe exterior of the bottom ofthe pot and is of the-bimetallic plate type; c of However a thermostatof: the gaseous, expansion type controlling by means of an expansiblebellows a mercury vswitchmay be employed and in such :a case a liquidcontaining tube :of the thermostat could conveniently behoused in thewax pot within abore-provided for'it in :a vertical boss H (indicated inFig. 1) I on'the plate 2 i. In order to mini-mizethe amount of'heatlostdue to radiation 'by the wax pot the latter is completely surroundedon all its sides and bot-'- tom by an aluminum casting 13 whichislar'ger than the 1ot, 'the space between the casting l3 and the potbeing filled with lag'wool or felt.

As has been heretofore S a th lsvvpro' tom edge in heat conductingcontact with a vided in the. web 5 only one opening I I, the reason forthis beingas follows. 'The rotation of the thread guiding rolls 4 9 and53 caused by drawing thread through 'the wax pot tends to setup acirculatory effect in the wax and were there two openings formed inopposite sides of the web,

the wax. would tend to circulate through the openings and around thefront and rear sides of the web 9, thus tending to lower the temperature of the waxin the smaller compartment which it is desired tomaintain at a higher temperature than that of the wax in the largercompartment,

By providing only oneopening-l I in the web, circulation of wax aroundthe web is prevented while still providing adequate communicationbetween the two compartments.

The nature and scope of the invention, having been indicated, and amachine-embodying the said plate andpot beingrelatively movable topermit access to the thread guides.

2. Thread waxing devices for sewing machines having, in combination, afixed mounting memher, a waxpot movably mounted on said member, meansfor heating the bottom of the waxpot, thread guides within the waxpotand a plate for supporting saidthread guides depending from.theifixed member downwardly into the wax 'pot and havingheat'conducting'contact along one edge with thebottom or" the pct.

3. Thread waxing devices for. sewing machines having, in combination,v,a wax pot, means for heating thebottomof the wax pot, thread guideswithin the wax ':pot,,a plate having heat conducting. contact, alongoneedge with the bottom of the -pot, and resilient meansifor maintaininginto the'wa'x pot and contacting along oneiedge with the bottom of'the,pot for. supporting said thread guides, and resilient means interposedbetween the fixed member and the platefor urging the contacting edgefofthe plate against the Wax pot. e '5. Thread waxing devicesl-forsewingmachines having, in combination, a wax pot,means for heating the bottomof the' wax' pot, thread guides within the wax pot, and a plate arrangedwith a grooved surface alongthebottom edge in heat conducting contactwith a correspondingly shaped upstanding rib on the bottom of the potfor supporting said thread'guides, said plate and pot being relativelymovable to permit access tothe thread guides.- 7 v 6. Threadwaxing-devices for sewing machines having-in combination, afixedmounting member, a'wax 'pot movably? mounted on saidmem ber, means forheating the'bottom of the wax pot, thread guides within the'wax pot, aplate on the mounting member arranged with an in verted 'v-sliapedgroov'e s'urface" along the botcorrespondingly shapedupstanding ribOIlYthE bottom of the pot for supporting said thread 7 guides, and meansfor forcing the wax pot up- Wa'rdlyf'again'st the'plate.

'7. Threadwaxing devicesfor sewing machines having; in combination; apot, means'for heating-the bottom of the wax pot, thread guides within"the wax pot, a plate for supporting said guides having heat conductingcontact-along its lower. portion with the bottom of the pot, and awax'stripper mounted on said plate, said plate and pot being relativelymovable topermit access to the thread guides. i V

'8. Thread waxing devices for sewing machines having, ini combination,a' wax pot, means for heating the bottom of the wax pot, thread guideswithin the wax pot, a plate having heat conducting contact along itslower portion with the bottom of the pot for supporting said threadguides, :andfa-neck extending fromfsaid plate arranged to catch and todeflect into the wax pot portions of-wax which arestripped from thethread as it leaves the pot, said plate and pot being relatively movableto permit access to the thread guides.

9. Thread waxing devices forsewingmachines having, in combination, afixed mounting member, a Wax pot movably mounted on said memoer, meansfor-heating the bottom of the wax pot, thread guides within the wax pot,a plate mounted on said member having heat conducting contact along itslower portion with the bottom of the pot and extending upwardly and toone side of the pot to form a neck arranged to catch and to deflect intothe wax pot any portions of wax which are stripped from the thread as itleaves the pct.

10. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, a vertical partition in the wax pot formingtwo intercommunicating compartments of unequal size, means in thesmallercompartment for guiding thread through the open top into and from thewax containedin the pot, and a heat-ire,- element beneath the partitionarranged to'heat the wax in the smaller compartment more rapidly thanthe wax in the larger compartment.

11. Thread waxing devices for sewing machines having, in combination, awax pot having an open top arranged with a vertical partition to formtwo intercommunicating compartments of unequal size, means in thesmaller compartment for guiding thread through the open top into andfrom the wax contained in the pot, electrical heating elemerits arrangedto heat the wax in the smaller compartment more rapidly than the wax inthe larger compartment, and a thermostat for controlling one or' saidelements to cut it out of operation when the temperature of the wax inthe pot has reached a predetermined value.

12. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, a partition in the wax pot forming twointercommunicating compartments of unequal size, means in the smallercompartment for guiding thread through the open top into and from thewax contained in the pot, electrical heating elements arranged to heatthe wax in the smaller compartment more rapidly than the wax in thelarger compartment, and a thermostat ior controlling one of saidelements to cut it out of operation when the temperature of the wax inthe pot has reached a predetermined value, the other heating element notcontrolled by said thermostat being arranged to heat the partitiondirectly.

13. Thread waxing devices for sewing machines having, in combination, awax pot, an intermediate partition in the wax pot forming twocompartments of unequal size, means in the smaller compartment forguiding thread through the wax contained in the pot, a heating elementbeneath the partition arranged to heat the wax in the smallercompartment more rapidly than the wax in the larger compartment and apassage provided at one point only through the partition arranged toprovide adequate communication between the two compartments whilepreventing circulation of the wax around the partition from movementimparted by the thread.

14. Thread waxing devices for sewing machines having, in combination, afixed mounting and cover member, having vertical bearings, vertical rodsin the bearings, a wax pot connected to said rods for movement towardsand from the mounting member, laterally extending hand wheels rotatableabout horizontal axes mounted on the wax pot, and means comprisingprojections on the mounting member, and cams on said hand wheels forclamping the wax pot to the mounting member when the hand wheels arerotated.

15. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, a vertical partition integral with the waxpot forming two inter-communicating compartments of unequal size, meansin the smaller compartment for guiding thread through the open top intoand from the wax contained in the pot, an electrical heating elementarranged beneath the pot to heat the partition directly, a secondheating element arranged beneath the smaller compartment, and athermostat for controlling the second heating element to cut it out ofoperation when the temperature of the wax in the pot has reached apredetermined value.

16. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, a vertical partition integral with the waxpot forming two inter-communicating compartments of unequal size, meansin the smaller compartment for guiding thread through the open top intoand from the wax contained in the pot, an electrical heating elementarranged to heat the partition directly, and a second heat; ing elementarranged beneath the smaller compartment.

17. Thread waxing devices for sewing machines having, in combination, awax pot, means for heating the bottom of the wax pot, thread guideswithin the wax pot, a plate having heat conducting contact along oneedge with the bottom of the pot for supporting said thread guides, and athermostat carried by said plate for controlling the heating means, saidplate and pot being relatively movable to permit access to the guides.

18. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, means outside of the wax in the, pot forheating the bottom of the wax pot, a vertical plate extending downwardlyinto the pot, and means for guiding thread through the wax contained inthe pot, comprising separated thread guides mounted on the plate nearthe lower edge of the plate to cause the thread to travel in anelongated path in proximity to and parallel with the bottom of the pot,said plate and pot being relatively movable to permit access to thethread guides.

19. Thread waxing devices for sewing machines having, in combination, awax pot having an open top, a heating element housed in the bottom ofthe wax pot for heating the bottom of the pot, a vertical plateextending downwardly into the pot, and means for guiding thread throughthe wax contained in the pot comprising separated thread guides mountedon the plate near the lower edge of the plate to cause the thread totravel in an elongated path in proximity to and parallel with theportion of the bottom of the pot in proximity to said heating element,said plate and pot being relatively movable to permit access to thethread guides.

FRANK COLEMAN CHOICE. ROWLAND AUGUSTUS LINEHAM.

